Almost eroded but still there: Oldest diatreme volcanoes of pre-Quaternary age in the eastern Bohemian Massif, Czechia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F25%3A00618252" target="_blank" >RIV/67985891:_____/25:00618252 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27350/25:10257751 RIV/00216208:11310/25:10500460 RIV/00025798:_____/25:10169521

Výsledek na webu

<a href="https://doi.org/10.1016/j.geomorph.2025.109668" target="_blank" >https://doi.org/10.1016/j.geomorph.2025.109668</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.geomorph.2025.109668" target="_blank" >10.1016/j.geomorph.2025.109668</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Almost eroded but still there: Oldest diatreme volcanoes of pre-Quaternary age in the eastern Bohemian Massif, Czechia

Popis výsledku v původním jazyce

Young volcanic forms are often well pronounced in topography and preserve valuable geological record ofnpaleoenvironmental evolution. However, in ancient volcanic fields (Ma old), some volcanic landforms may existnonly as erosional remnants that are completely transformed by long-term denudation. The identification of suchnstructures is challenging owing to their small size and subtle geomorphic signature. Earlier magnetic surveysnfrom the 1960s identified a minor volcanic form of unclear origin at a site within the Brunt´al Volcanic Field, anLate Cenozoic intraplate volcanic province in Central Europe (Czechia). Newly conducted high-resolutionnmagnetic, gravity, and geoelectrical surveys of the site revealed remnants of two deeply eroded diatremes andntheir feeder dykes. Analysis of the collected samples and excavated material from shallow trenches supports thenphreatomagmatic origin of these structures. The two analogous circular diatremes, separated by a distance ofn750 m, exhibit pronounced magnetic and conductive responses. Their small diameters (<100 m), coupled withnminor negative gravity anomalies and the presence of excavated diatreme breccias, suggest the exposure of andeep part of the diatremes, e.g. root-zones, at the current erosional surface. The material buried in the diatremesnalso allows for the deduction of the previous extent of concurrently eroded Neogene sediments in the area.nDespite unsuccessful attempts at Ar–Ar dating, the Neogene age assumed based on the deep erosional level of thenvolcanic vents makes them the oldest known maar-diatreme volcanoes in the eastern Bohemian Massif. Thisnstudy provides very rare information about explosive volcanism in the area of northeastern margin of the Bo-nhemian Massif and is the first-ever study on regional pre-Quaternary phreatomagmatism in the Brunt´al VolcanicnField.

Název v anglickém jazyce

Almost eroded but still there: Oldest diatreme volcanoes of pre-Quaternary age in the eastern Bohemian Massif, Czechia

Popis výsledku anglicky

Young volcanic forms are often well pronounced in topography and preserve valuable geological record ofnpaleoenvironmental evolution. However, in ancient volcanic fields (Ma old), some volcanic landforms may existnonly as erosional remnants that are completely transformed by long-term denudation. The identification of suchnstructures is challenging owing to their small size and subtle geomorphic signature. Earlier magnetic surveysnfrom the 1960s identified a minor volcanic form of unclear origin at a site within the Brunt´al Volcanic Field, anLate Cenozoic intraplate volcanic province in Central Europe (Czechia). Newly conducted high-resolutionnmagnetic, gravity, and geoelectrical surveys of the site revealed remnants of two deeply eroded diatremes andntheir feeder dykes. Analysis of the collected samples and excavated material from shallow trenches supports thenphreatomagmatic origin of these structures. The two analogous circular diatremes, separated by a distance ofn750 m, exhibit pronounced magnetic and conductive responses. Their small diameters (<100 m), coupled withnminor negative gravity anomalies and the presence of excavated diatreme breccias, suggest the exposure of andeep part of the diatremes, e.g. root-zones, at the current erosional surface. The material buried in the diatremesnalso allows for the deduction of the previous extent of concurrently eroded Neogene sediments in the area.nDespite unsuccessful attempts at Ar–Ar dating, the Neogene age assumed based on the deep erosional level of thenvolcanic vents makes them the oldest known maar-diatreme volcanoes in the eastern Bohemian Massif. Thisnstudy provides very rare information about explosive volcanism in the area of northeastern margin of the Bo-nhemian Massif and is the first-ever study on regional pre-Quaternary phreatomagmatism in the Brunt´al VolcanicnField.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10507 - Volcanology

Projekt

<a href="/cs/project/GA21-30043S" target="_blank" >GA21-30043S: Petrogeneze a vmístění hlubokomořských alkalických bazaltoidů: případ spodnokřídového magmatismu severní Tethydy</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Geomorphology

ISSN

0169-555X

e-ISSN

1872-695X

Svazek periodika

475

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

109668

Kód UT WoS článku

001428866500001

EID výsledku v databázi Scopus

2-s2.0-85217969265